Improved performance and stability in quantum dot solar cells through band alignment engineering.
Improved performance and stability in quantum dot solar cells through band alignment engineering.
复制标题
DOI：
10.1038/nmat3984
复制
发表时间：
2014-08
期刊：
影响因子：
41.2
通讯作者：
Bawendi, Moungi G.
中科院分区：
文献类型：
--
作者：
Chuang, Chia-Hao M.;Brown, Patrick R.;Bulovic, Vladimir;Bawendi, Moungi G.
溶液加工是实现低成本、大面积、柔性轻质、能量回收时间短、比功率高的光伏器件的一条有前途的途径。然而，迄今为止报道的基于溶液加工的有机、无机和杂化材料的太阳能电池普遍存在空气稳定性差、需要惰性气氛加工环境或需要高温加工，所有这些都增加了制造复杂性和成本。同时实现高效率、低温制造条件和良好大气稳定性的目标仍然是一个重大的技术挑战，正如我们在此演示的，随着室温溶液加工的 ZnO/PbS 量子点太阳能电池的开发，这个问题可以得到解决。通过使用不同的配体处理来设计量子点层的能带排列，已达到 8.55% 的认证效率。此外，未封装的器件在空气中储存超过 150 天后性能保持不变。该材料系统引入了一种新方法，以实现高性能空气稳定太阳能电池的目标，该电池与简单的溶液工艺和柔性基板上的沉积兼容。
Solution processing is a promising route for the realization of low-cost, large-area, flexible and lightweight photovoltaic devices with short energy payback time and high specific power. However, solar cells based on solution-processed organic, inorganic and hybrid materials reported thus far generally suffer from poor air stability, require an inert-atmosphere processing environment or necessitate high-temperature processing, all of which increase manufacturing complexities and costs. Simultaneously fulfilling the goals of high efficiency, low-temperature fabrication conditions and good atmospheric stability remains a major technical challenge, which may be addressed, as we demonstrate here, with the development of room-temperature solution-processed ZnO/PbS quantum dot solar cells. By engineering the band alignment of the quantum dot layers through the use of different ligand treatments, a certified efficiency of 8.55% has been reached. Furthermore, the performance of unencapsulated devices remains unchanged for over 150 days of storage in air. This material system introduces a new approach towards the goal of high-performance air-stable solar cells compatible with simple solution processes and deposition on flexible substrates.
登录
查看更多内容
影响因子：
10.8
作者：
Gao, Jianbo;Perkins, Craig L.;Beard, Matthew C.
通讯作者：
Beard, Matthew C.
影响因子：
11.4
作者：
Wadia, Cyrus;Alivisatos, A. Paul;Kammen, Daniel M.
通讯作者：
Kammen, Daniel M.
影响因子：
4
作者：
Johnston, Keith W.;Pattantyus-Abraham, Andras G.;Sargent, Edward H.
通讯作者：
Sargent, Edward H.
影响因子：
10.8
作者：
Chang, Liang-Yi;Lunt, Richard R.;Bawendi, Moungi G.
通讯作者：
Bawendi, Moungi G.
影响因子：
35
作者：
Rath, Arup K.;Bernechea, Maria;Konstantatos, Gerasimos
通讯作者：
Konstantatos, Gerasimos